Perhaps you should try some spelling variations:
nhanh nong » nhanh dong, nhanh song, nganh nong
ban thanh » ban hang
cuu dong » cuu cong, cuu tong, cuu long
co nhanh » co thanh, co hanh, co phanh
nong hoc » dong hoc, nang hoc, nong thon
ban hanh » ban hang
cac hoc » cach hoc, cac hop, bac hoc
ma hai » ta hai, va hai, xa hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac hoc tap, nghien cuu dong co nhanh nong hoc ma hai ((ban thanh) or (ban hanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac hoc tap, nghien cuu dong co nhanh nong hoc ma hai ((ban thanh) OR (ban hanh)) van.
• Adding a wildcard symbol may retrieve word variants: tu cac hoc tap, nghien cuu dong co nhanh nong hoc ma hai ((ban thanh) or (ban hanh)) van*.